Mojave Project’s Antimony Target Expands 400% to 1.2 km Strike Length

Major Expansion at Desert Antimony Mine

Locksley Resources Limited (ASX, LKY) has announced a significant breakthrough at its Mojave Project in California, with structural mapping expanding the strike length of the Desert Antimony Mine (DAM) target from 0.3 km to 1.2 km; a remarkable 400% increase. This expansion not only enlarges the footprint of the mineralised corridor but also enhances the potential scale of the antimony system, a critical mineral for U.S. supply chains.

The mapping also identified a parallel shear zone approximately 150 metres west of the main DAM structure, suggesting a multi-zone mineralised system. This discovery could indicate a more complex and extensive mineralisation framework than previously understood, increasing the project's strategic value.

Advancing Exploration with 3D Geological Models

Incorporating these findings, Locksley has developed an updated 3D geological model that defines seven priority surface sampling targets. These targets will guide imminent exploration efforts and support the formulation of a JORC Exploration Target, a critical step towards future drilling programs. The enhanced structural understanding also highlights key mineralisation controls, such as steep north-plunging intersections between shear zones and folded host rocks.

Beyond antimony, the Hendricks Prospect within the Mojave Project has returned high-grade silver assays reaching 216 grams per tonne, alongside anomalous lead, zinc, and copper. These results point to a broader polymetallic system, potentially increasing the project's overall resource diversity and attractiveness.

Strategic Alignment with U.S. Critical Minerals Policy

The Mojave Project's growing scale and geological complexity position it as a district-scale critical minerals hub, aligning closely with accelerating U.S. government initiatives aimed at securing domestic supply chains for strategic minerals. Programs such as the Defense Production Act Title III and the Department of Energy’s ARPA-E emphasize the importance of fast-tracking clean, high-grade antimony feedstock, which the DAM target zones appear well-suited to supply.

Locksley’s CEO Kerrie Matthews highlighted the transformative nature of the recent mapping, stating that the results have "fundamentally changed the scale of the opportunity" and validated the company’s rapid exploration and development strategy in a critical geopolitical context.

Next Steps and Future Potential

Following the success of the second structural mapping program, Locksley plans a third phase of mapping commencing in late November 2025 to further refine geological understanding and identify new targets. The company is also advancing 3D geological models at other prospects within the Mojave Project, including Junipero and Hendricks, to support ongoing exploration and drill planning.

With no domestic antimony production currently in the U.S., and the Mojave Project’s proximity to the Mountain Pass Mine, the only operating rare earth deposit in the district, Locksley is uniquely positioned to contribute to the nation’s critical minerals independence. The upcoming drilling programs and further sampling will be pivotal in confirming the economic potential of these expanded targets.